fisher



March 17, 1964 F|$HER 3,124,805

BOTTOM STOP APPLICATOR Filed Oct. 3, 1960 9 Sheets-Sheet 1 ATTORNEYSMarch 17, 1964 H. M. FISHER BOTTOM STOP APPLICATOR 9 Shets-Sheet 2 Filed001;. 3, 1960 INVENTOR.

March 17, 1964 H. M. FISHER 3,124,805

BOTTOM STOP APPLICATOR Filed Oct. 3, 1960 9 Sheets-Sheet 3 A nu /YEVG 9Sheets-Sheet 4 w mw m m n. W. A m y 1 March 17, 1964 H. M. FISHER BOTTOMSTOP APPLICATOR Filed Oct. 5, 1960 March 17, 1964 H. M. FISHER BOTTOMSTOP APPLICATOR Filed Oct. 3, 1960 9 Sheets-Sheet 5 ZOI INVENTOR Hag/ y/7- 56116;

Arroplvevs March 17, 1964 H. M. FISHER 3,124,805

BOTTOM STOP APPLICATOR Filed Oct. 3. 1960 9 Sheets-Sheet 6 IN V EN TOR.

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BOTTOM STOP APPLICATOR Filed Oct. 5, 1960 9 Sheets-Sheet 7 INVEN TOR.

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BOTTOM STOP APPLICATOR Filed 001;. 5, 1960 9 Sheets-Sheet 9 INVENTOR.#442 9) /2 55/459 ,4 rro /ycys United States Patent 3,124,805 BOTTGMISTOP APPLICATOR Harry M. Fisher, 157-36 22nd Ave., Whitestone, N.Y.Filed Oct. 3, 1960, Ser. No. 60,087 7 Claims. (Cl. 1-16) This inventionrelates to an improved machine for applying bottom stops to zipperblanks and the like.

In accordance with known practice, it has been common to produce longzipper blanks, comprising a pair of tapes, each tape having scoopsmounted thereon, and the scoops being adapted to be interlocked by aslider. Also in accordance with such known practice, these blanks areoriginally made in a continuous length, with intervals of tape havingscoops thereon. The interruption interval or slit between successivesets of scoops varies depending upon manufacturing practice. By way ofillustration, such interruption interval or slit might be on the orderof two inches. Ultimately, the tapes are intended to be severed acrossthe scoop interruption intervals to form the individual zippers.

In order to prevent the scoops of a particular zipper from separating,it is necessary that appropriate means he provided at the ends of thechain of scoops. In particular, it has been known to provide a form ofstaple commonly known as a bottom stop, to one end of each set of scoopsprior to cutting the tape at the interruption intervals. This inventionis concerned with improved means for applying said staple known as abottom stop to one end of the succession of scoops forming one zipper inconjunction with the tapes on which they are mounted. Subsequently, andas no part of this invention, appropriate fastening means of one type oranother are applied to the other end of the interval of scoops on eachtape of the zipper.

Also in accordance with known practice, it has been known to place thetape and scoop assembly manually in a press, in which the bottom stop isapplied to the end of the chain of scoops by means of a plunger and die.

One object of this invention is to provide an automatic machine forapplying bottom stops to zippers.

Another object of this invention is to provide an automatic machine forapplying bottom stops to zippers, wherein the drive means for the tapesmay be in continuous operation.

Another object of the invention is to provide a machine of theabove-described type which can be operated at extremely high speed.

Another object of this invention is to provide an imroved hopper forfeeding the bottom stops or staples to the applicator machine.

In accordance with a preferred embodiment of the invention, the machineincludes an anvil over which the blank may be drawn by means of drawrollers. These rollers are located in advance of the anvil and aremounted so as to be movable toward and away from the anvil, the rollersbeing spring biased toward the position thereof away from or remote fromthe anvil. Also in accordance with the preferred embodiment, the anvilhas a through slot therein through which a pin extends slidably, thispin being normal to the blank as it is drawn over the anvil. Springmeans urge one end of the pin against the blank. During the travel ofthe blank, the pin rides against the scoops until it enters a scoopinterruption interval or slit. When the trailing end of the scoopinterruption interval or slit strikes the pin, the tape cannot advance.The mounting of the rollers is such that as the result of theircontinued rotation, they move toward the anvil, against the action ofthe spring. This movement of the draw means toward the anvil actuates aone revolution clutch which n in turn permits an application mechanismto apply a bottom stop to the blank against the end of the pin and3,124,805 Patented Mar. 17, 1964 against the anvil. The pin is retractedsomewhat as the result of this application of the bottom stop and bearsagainst such bottom stop. The pin is shaped so that the action of thedraw rollers can cause the bottom stop and subsequent scoops to slideover the ends of the pin, thereby permitting resumption of the movementof the blank. The spring for the draw rollers then returns them to theirnormal position, the combined action of this spring and of the drawrollers providing a rapid increment to the movement of the blank.

As an important feature of the invention, the action is essentiallymechanical. Furthermore, the feeler pin which senses the location of ascoop interruption interval, at the same time serves as a stop to halttemporarily the movement of the blank, and furthermore serves thereby toactuate the clutch which controls the applicator mechanism. As a furtherfeature of the invention, in the event that a bottom stop is notpresented by the hopper to the applicator mechanism, the applicatormechanism is constructed so as to cooperate with the pin to lock theblank from further movement and to actuate means for turning off themachine. This provides positive means for preventing any portion of theblank from passing the anvil station without a stop being appliedthereto.

Other objects and advantages of this invention will become apparent fromthe following description, in conjunction with the annexed drawings, inwhich a preferred embodiment of the invention is disclosed.

In the drawings:

FIG. 1 is a side elevational view of the improved machine, showing azipper blank being drawn through the machine.

FIG. 2 is a detail perspective view of the drive mechanism for drawingthe zipper blank through the machine.

FIG. 3 is a detail perspective view of a portion of the machine, showingthe control mechanism for the one revolution clutch.

FIG. 4 is a detail perspective view of the machine, showing inparticular the mechanism for applying the bottom stop to the blank.

FIG. 4a is a top plan view of a detail showing the cut-out.

FIG. 5 is a detail perspective view of the machine, showing the controlmechanism for the one revolution clutch.

FIG. 5a is a side detail elevational view showing the clutch.

F-IG. 6 is a fragmentary perspective view of the one revolution clutchin accordance with this invention, the clutch being shown prior toactuation thereof.

FIG. 7 is a view similar to FIG. 6, showing the clutch control in itsinitial rotary movement.

FIG. 8 is a perspective view similar to FIG. 6, showing an intermediatestage of its revolution.

FIG. 9 is a further perspective view similar to FIG. 6, showing theclutch near the end of its revolution.

FIG. 10 is a vertical section of one form of hopper suitable for use inaccordance with this invention, the track leading from the hopper beingbroken away.

FIG. 11 is a section on line 11-11 of FIG. 10.

FIG. 12 is a section on line 12-12 of FIG. 10.

FIG. 13 is a perspective view of the bottom stop.

FIG. 14 is a fragmentary longitudinal section of the one revolutionclutch mechanism, showing the clutch disengaged.

FIG. 15 is a view similar to FIG. 14, showing the clutch engaged.

FIG. 16 is a fragmentary longitudinal section of the machine showing themechanism for applying a stop to the zipper blank, prior to actuation ofthe mechanism.

FIG. 17 is a view similar to FIG. 16, showing a pin extended through thezipper blank and against the bottom stop.

FIG. 18 is a view similar to FIG. 16, showing a stop about to be appliedto the blank.

FIG. 19 is a view similar to FIG. 16, showing the stop applied to theblank.

FIG. 20 is a view similar to FIG. 16, showing the parts returning towardtheir starting positions.

FIG. 21 is a fragmentary horizontal sectional view of the stopapplication mechanism showing the stop prior to its application to thezipper blank and showing the aforesaid pin riding against the scoops ofthe blank.

FIG. 22 is a view similar to FIG. 21, showing the pin extended throughthe blank.

FIG. 23 is a view similar to FIG. 21 showing the stop being applied tothe blank.

FIG. 24 is a view similar to FIG. 23, showing the stop fully applied tothe blank.

FIG. 25 is a fragmentary exploded perspective view of the various partsof the stop application mechanism.

FIG. 26 is a fragmentary perspective view of the machine showing a stageof operation of the one-revolution clutch.

FIG. 27 is a fragmentary perspective view of the blank showing the stopapplied thereto.

General Description The machine includes as major elements a feed assem'bly 100 for a zipper blank 15, an application mechanism 101 for applyingbottom stop staples 14 to the blank 15, a hopper mechanism 102 forsupplying staples to application mechanism 101, and a control mechanismincluding a one revolution clutch, designated by the reference numeral104, for the stop application mechanism 101, the one revolution clutchbeing adapted to be actuated by the feed mechanism 100.

The Zipper Blank Zipper blank 15 (FIG. 27) comprises a pair of tapes inside-by-side relationship and having adjacent beads 31. Scoops 32 arefixed to the respective tapes 30, over the beads 31, in the usualmanner, with the scoops on one tape releasably locked with the scoop onthe other tape. In the specification and claims, it will be understoodthat the term scoop includes equivalent interlocking elements. The tapesare divided into scoop intervals, wherein the interlocking scops areaffixed thereto, and scoop interruption intervals, wherein the scoopsare omitted, thereby defining a series of slits 23 in the zipper blank.Optionally, but without limitation thereto, the slits 23 are of uniformlength and the scoop intervals are of uniform length which is muchgreater than the length of slit 23.

The Zipper Blank Feeder The machine is mounted on a longitudinallyextending frame 105 (FIG. 1) having a front standard 106 and a rearstandard 107, which may be mounted on a floor or other suitable support.Below the top of standards 106 and 107, they are coupled by a plate 108upon which motor 109 having an output pulley 110 rotatable about alateral axis, may be mounted. A longitudinally and vertically extendingplate 111 is fixed to the upper ends of standards 106 and 107, andextends slightly forwardly of standard 106.

The lower end of a lever 112 (FIG. 2) is turnably attached to the frontend of bar 111 by means of lateral pivot shaft 113 which extends throughsaid bar 111 and turnably through an opening in lever 112. Lever 112 issecured to the end of shaft 113 by means of screw 114 and washer 115.Lever 112 extends above bar 111 and also is forwardly, upwardly inclinedin its normal position.

A pair of lateral shafts 116 and 117 extend through the upper end oflever 112, with shaft 117 located above shaft 116. Roller 118 is fixedlymounted on shaft 117 at one side of lever 112. Roller 119 is fixedlymounted on shaft 116 at the same side of lever 112. Roller 119 has aperipheral circumferential groove 120. The zipper tape assembly 15 isadapted to be drawn frictionally forwardly between the rollers 118 and119, with the scoops 32 extending into groove 120.

On the other side of lever 112, gears 121 and 122, having 1l ratio, arefixably mounted on shafts 116 and 117 in meshing relationship with eachother. Outwardly of gear 121, sprocket 123 is fixably mounted on shaft116. A further sprocket 124 is turnably mounted on shaft 113 and iscoupled to sprocket 123 by means of chain 125. Pulley 126 is turnablymounted on shaft 113 outwardly of sprocket 124 and is fixedly coupled tosprocket 124 and is adapted to be driven so as to rotate the drivingmembers of the feed assembly 100.

In order to drive pulley 126, lateral shaft 127 is mounted on verticallyand laterally extending frame member 128 (FIG. 1) located at the rear ofthe machine. This frame member 123 is fixed to frame member 111 by meansof a vertically extending frame member 129 and is located above framemember 111. At one end of shaft 127, pulleys 130 and 131 are turnablymounted thereon to turn in unison. Pulley 131 is coupled to pulley bymeans of pulley belt 132. Vertically extending frame member 133 is fixedto frame member 111, so as to extend above same, by means of framemember 134 (FIG. 1). Laterally extending shaft 53 extends turnablythrough the upper part of frame member 133. Pulley 54 is mounted onshaft 53 and is coupled to pulley by means of pulley belt 135. A furtherpulley 136 coupled to pulley 54 on shaft 53 is coupled to pulley 126 bymeans of belt 137.

Longitudinally extending control bar 138 is mounted upon lever 112 bymeans of pivot 139 and extends toward the rear of the machine. Spring140 between bar 133 and frame member 111 urges bar 138 forwardly. Hencespring 140 normally maintains draw rollers 118 and 119 in their fullline position of FIG. 1.

Safety mercury switch 141 on lever 112 (FIG. 2) is normally closed.Leads 142 of switch 141 are included in the electric supply circuit (notshown) of mo tor 109. Upon abnormal rearward movement of bar 133 anddrive assembly 100, switch 141 is opened and motor 109 stops running.

The Mounting Mechanism The application mechanism 101 is supported uponupright a fixed to member 111 at the center of the frame, as well asvertically and longitudinally extending frame plate 134 fixed to member111 behind member 150a (FIG. 1).

Anvil support 151 is fixed to the outer face of upright 150a by anysuitable means. Anvil support 151 includes a block 150 which extendslaterally and vertically and has a rectangular aperture in the bottom ofwhich support block 151a is received (FIG. 4). Block 151a extendsforwardly and rearwardly of block 150. Block '152 rides slidably uponblock 151 and through the upper part of the aperture of block 150, asshown in FIG. 4. Block 152 may be moved and locked in position by anysuitable means (not shown).

Block 154 is fixed to the top rear of block 152 by means of screws 15 5.Block 154 has .a laterally elongated, convex upper rear surface (FIG.25). Blank 15 is brought from below and behind block 152, over theconvex surface of block 1154 (FIG. 1) and between rollers 118 and 119 asdescribed above. In case of re-threading of the blank, clearing a jam orcleaning, block 152 may be temporarily slid forwardly.

As shown in FIG. 25 and other views, block 154 has a longitudinallyextending through bore 156. Bore 156 is generally cylindrical and isflattened at the top and bottom. Anvil member 157 conforms in shape tobore 156 and extends non-rotatably therethrough. Set screw 158 extendslaterally through block 152 and against the side of anvil member 157.Anvil member 157 has anvil depressions 179 in the top of its rear face.Depressions 179 are vertically aligned with vertical groove 178 in therear face of member 157 and vertical groove 177 in the rear faces ofblocks 154 and 152. Grooves 177 and 17 8 receive the scoops of theblank.

Member 157 has a vertically and longitudinally extending slot 159extending axially therethrough and to the top thereof. Slot 159 extendsbetween anvil depressions 179. The rear part of slot 159 is of reducedheight to define a stop shoulder 161 (FIG. and other views) extendingupwardly from the bottom of slot 159. Vertically and longitudinallyextending slot 162 in block 152 is located above and communicates withslot 159.

Vertically and longitudinally extending plate 163 is longitudinallyslidably received in slots 159 and 162. Rearward movement of plate 163is limited by stop 16 1. Rear extension 164 of plate 163, whichextension 164 may be considered as a pin, is of reduced height andclears stop 161 and can extend rearwardly thereof. In the rearmostposition of plate 163, its rear end abuts shoulder 161, and pinextension 164 extends through blank slit 23 and rearwardly thereof.

The movement of plate 163 and pin 164 is regulated in part by means ofrocker shaft 166 (FIG. 26), which extends laterally turnahly throughblock 16 -7 mounted on the front of block 154 by means of screw 168;block 167 being located forwardly of block 152. Shaft 166 also extendsturnably through a lateral bore of block 152. Plate 169 (FIGS. 4 and 26)is welded to shaft 166 and is movably received within cutout 16911 ofblock 152. The upper end of plate 169 opposes the front of plate 163.Collar 176 is fixedly mounted on shaft 166 at the other side of block167 from block 152. Screw 171 in the periphery of collar 176 serves as apost to which the upper end of coil spring 172 is connected. Spring 172extends around the rear of collar 171 under tension. The lower end ofspring 172 is connected to frame piece 111.

Initially, as blank 15 is conveyed, pin 164 strikes the scoops 52 and isin its front position (FIG. 16). Plate 169 is upward rearwardly inclinedand presses pin 164 rearwardly. Wh n pin 164 opposes slit 23, the actionof spring 172 causes plate 169 to push plate 163 and pin 164 rearwardly.Pin 164 in slit 23 and abutting a section of scoops 32, preventsmovement of blank 15. Bar 158 moves rearwardly, because of the continuedaction of rollers 118 and 119 on the blank.

In order to mount the stop in place and move pin 164 forwardly, a threepart guide element 186 (FIG. and other views) is fixed to plate 134- (byany suitable means, not shown) behind block 152 (in the relativepositions shown in FIG. 4). This guide element 181 comprises upper block1311, intermediate block 152 and lower plate 183.

Block 182 (has a vertically and longitudinally extending through slot184 extending to its lower face. Plate 183 closes the bottom of slot 184and is connected to the bottom of block 1 32 by screws through holes185. Bar 186 extends frictionally slidably through slot 164. Forwardlyof element 189, vertical pressure plate 187 is fixed to bar 156.Rearwardly of element 186', longitudinally extending rod 188 is fixed tothe rear end of bar 186 and extends slidably through a suitable bore ofbearing block 196 fixed to frame plate 134 behind element 136 (FIG. 4).Spring 159 around rod 188 bears between bar 136 and block 196 and urgesplate 187 forwardly. Pin 186a on bar 156 limits forward movement thereofby engagement of pin 186a against the rear of block 132. Vertical sideflanges 191 on the front of plate 187 (FIG. 23) bear against tapes 36outwardly of beads 31 and hold blank 15 against the rear face of block152 with beads 31 received within grooves 177 and 178.

Block 151 rests upon block 152 and is secured thereto by screws throughholes 192 and 193. Block 181 has a through longitudinal slot 194 in thelower face thereof, in which bar 195 is slidably received. Block 182 has6 bosses 196 on its upper face, at the front thereof, between which saidbar 195 slides. Block 181 is slightly shorter than block 182 and bosses196 are located in front of block 181.

The scoop supply mechanism 102, as will be explained in detail below,includes a track 18 having vertically extending coplanar bars 38 and 39,bar 38 being located rearwardly with respect to bar 39. Stop 14 has itshead 34 in the space between bars 38 and 39, with legs 35 straddling bar39. Bar 38 is received in notch 197 in the front of block 131 andextending to the top thereof. Bar 38 has a rear bottom notch to define ashoulder 198 which rests on block 181. Lateral pin 199 extends throughbore 199a of block 181 and slot 197 and vertically elongated slot 260 inbar 38. Slit 41) between bars 38 and 39 opposes and is spaced aboveblock 182 between bosses 196. The clearance between the lower ends ofbars 38 and 39 and the top of block 182 is slightly greater than theheight of stop head 34. The lower edges of the lowermost stop head 34and legs 35 rest on block 182 between bosses 196. Projection 269a on thelower end of bar 33 is received slidably in elongated slot 291 in thefront of pusher bar 195. The lower front of bar 39 is cut away at 252 toclear plate 137.

In the forward stroke of pusher bar 195, its front end carries thelowermost stop 14 through slot 293 in plate 187 (which is closely spacedfrom block 154) and hence against pin 164, and finally carries the stoplegs against anvil depressions 179. In the event that no stop ispresent, pin 164 can move through slot 261 and slot 203 and also throughslot 294 which communicates with the lower edge of slot 263. Thispositively prevents movement of blank 15.

In order to guide bar 195, it has a rear head 206 which is coupled tofront yoke 267 of longitudinal bar 263 (FIG. 4) by lateral pivot pin 209(FIG. 4). This bar 298 extends slidably through a longitudinal throughgroove in the top of block 196, the top of block being closed by plate211 via screws 211. Spring 211a between pin 212 of yoke 297 and pin 213on block 191) urges bar rearwardly.

The Hopper Hopper 19 (FIGS. 1 and 11) is in the form of a cylindricaldrum 51) having end plates 51 and 52. End plate 51 is removable, so thatdrum 59 may be filled with stops 14. Drive shaft 53 extends through endwall 52, and has the aforesaid driven sprocket 54 mounted on the outerend thereof.

Laterally spaced blades 56 extend transversely with respect to shaft 53and have bores through which shaft 53 extends. Blades 56 are fixed toshaft 53. The ends of each blade 56 extend slidably into acircumferential groove 57 in the wall of drum 5% Drum 50 has a centralcircumferentially extending slit 519a extending from near the topthereof to the bottom thereof. Bar 38 of track 18 extends into thebottom of slit 59a. Bar 39 of track 18 also extends into the slit and iscurved as shown at 39a corresponding to the cylindrical shape of drum56, and extends to near the top of slit 56a. The slight gap is closed byany suitable element 58. Bars 35 and 39 are coplanar and of rectangularcross section and are slightly spaced from each other to define theaforesaid slit 46. Plates 37 (only one is shown) are fixed to bars 38and 39 by means of screws 37b to hold the bars fixed relative to eachother.

Blades 56 agitate stops 14. Certain stops reach the position in whichtheir legs 35 straddle bar 39a with their heads 34 frictionally abuttingthe inner edge of bar 39a. Said stops 14 then slide downwardly on bar39a under the influence of gravity (arrow 46a) until heads 34 enter slit49 with legs 35 then straddling bar 39. Stops 14 then slide down track13. Lengthwise groove 37a in plate 37 provides clearance for legs 35(FIG. 12).

The Control Mechanism Control mechanism 104 (FIGS. 1 and 3) is actuatedby the previously mentioned bar 138, which is moved rearwardiy againstthe action of spring 143, when the moving web or blank stops moving andthe drive mechanism 103 is pivoted towards its broken line position ofFIG. 1. This bar 138 is longitudinally slidably supported adjacent itsrear end by means of an L-shaped bracket 220 which is fixed to framemember 128. The extreme rear end of bar 138, designated by the referencenumeral 221, is tapered or wedge-shaped and has a convex contour, toserve as a cam.

Frame member 128 has an upward extension 222 near the rear thereof.Longitudinally extending pivot shaft 223 is fixed to frame extension 222and extends rearwardly thereof. Block 224 is turnaoly mounted on pin223; plate 225 is fixed to block 224 and extends vertically downwardlytherefrom and also extends longitudinally. Bracket bar 226 extendslaterally from plate 225, adjacent the bottom thereof, and connects atits free end with an integral downwardly extending leg 227 which isattached to the rear end of frame member 123, behind and aligned withbracket 220. Upon sufficient rearward movement of bar 133, the camportion 221 enters between bar 227 and frame member 128 and pivots plate225 slightly about its axis. Essentially, plate 225 is moved to theleft, as viewed from the front of the machine. Block 228 fixed to plate225 near its pivot, on the same side as bar 226, serves to maintain thecenter of gravity of the assembly of plate 225 and its bracket so asautomatically to return bar 227 into abutment with frame member 128 whenbar 138 is moved forwardly out of engagement with bar 227.

Bracket 22? is fixed to plate 225 on the same side as bar 226 andsomewhat above bar 226. Bracket 229 is U-shaped and has spaced laterallegs 23%, between which extends a longitudinal pivot 231. Laterallyextending bar 232 is mounted upon pivot 231 so as to be turnable aboutthe axis thereof.

Bracket block 233 extends laterally from frame member 128 forwardly ofmember 222, and on the same side of member 128 as bracket 220. Bracketblock 233 has a horizontal slot 234 adjacent the top thereof and openingon the free vertical edge thereof. Lever bar 235, which actuates theone-revolution clutch, is turnably received within said slot 234 uponvertical pivot pin 236a. Lever 235 is spaced from frame member 128.Spring 236 between lever 235 and frame member 128, located rearwardly ofpivot 236a, biases the rear end of lever bar 235 toward frame member123. Lever bar 235 extends rearwardly of bar 232. Bar 232 extends overand laterally past bar 235 and normally rests by gravity there upon. Thelower free portion of bar 232 is cut away to provide a shoulder 237against the side edge of bar 235. When plate 225 is pivoted, either bymanual pressure thereon or by rearward movement of bar 133, shoulder 237catches against the side of lever 235 and pivots it, against the actionof spring 236.

Forwardly of pivot 236a, lever 235 extends through notch 245 in lateralbar 246 fixed to frame member 128. Normally, spring 236 holds bar 235 inposition in which lever 235 abuts the end of notch 245 remote from framemember 128.

Plate 233 has a vertical slot 238 extending to the bottom thereof. Leverbar 239 extends through slot 233 and is supported therein turnably bymeans of lateral pivot 244). The rear portion of lever bar 233 extendsunder bar 232, between lever 235 and plate 225. Normally, the weightbalance of lever bar 239 is such that it is out of engagement with bar232. When the front portion of bar 239 is depressed, elevating the rearportion of lever 239, it strikes and elevates bar 232, so that shoulder237 is located above and clears lever 235.

As previously mentioned, motor 110 drives pulley 131 by means of belt132, and pulley 13% which turns in unison with pulley 131, drivesremaining parts of the machinev These pulleys and 131 are turnablymounted on previously mentioned shaft 127. Collar 39!) (FIGS. 3, 14, 15and 26) is turnably mounted on shaft 127 inwardly of and adjacent pulley131. Collar 300 serves as a cam, since it carries a cam projection orboss 391. Normally, collar does not turn. Normally, boss 3G1 abuts thefront end of lever 235 (FIG. 6).

Shaft 127 has an axially elongated groove 3G2 extending into theperiphery thereof. This groove 302 extends laterally beyond each side ofcam 303 and underlies the inner portion of the periphery of the bore ofpulley 131. Slide member 3413 is slidably received within groove 38 2.Spring 334 in groove 392 extends between the inner end of groove 332 andthe inner end of slide 333 and urges slide 333 outwardly. Slide 303protrudes beyond the periphery of shaft 127 and into a radial slot 303::(FIG. 14) in the wall of the bore of earn 363. In the inner position ofslide 333, shown in MG. 14, slide 333 is located entirely inwardly ofpulley 131. In the outer position of slide 383, shown in FIG. 15, slide303 extends to the extreme outer end of groove 392 and also extends intoa radial recess 305 in the inner face of pulley 131 communicating withthe bore of pulley 131. In this latter position of the slide, cam 300turns in unison with pulley 131. There are optionally four equallyspaced radial recesses 305 in pulley 381 for reception of slide 303.

Block 306 is fixed to frame member 128 below member 245 and above lever239 (FIG. 3). Bar 397 is fixed to the longitudinal face of block 306 andextends longitudinally and vertically and extends forwardly thereof. Thefront end 368 of bar 307 serves as a wedge. Slide 303 has an elongatednotch 339 (FIGS. 14 and 15) which can accommodate wedge 393. Adjacentthe inner edge of notch 309, the slide 303 is shaped to provide aradially offset cam surface 310 which cooperates with wedge 35S.Specifically, the face of wedge 368 is convex and the member 310 istapered and convex. In the upright position of earn 310, in which itabuts wedge 303, the cam 310 is oppositely tapered and oppositely convexwith respect to wedge 303. When cam 310 is out of engagement with wedge308, cam 306 and pulley 131 turn in unison. When wedge 308 is located inengagement with cam 310, cam 3120 does not turn in unison with pulley131.

In the starting position of the clutch, shown in FIG. 6, boss 30 1 abutsthe front end of lever 235, and cam 310 engages against the widest partof wedge 3% adjacent the lower end thereof. Arrow 311 in FIG. 8 givesthe direction of turning of cam 3%, this being such as to tend to dropthe earn 310 below the level of wedge 308.

A bias is imparted to the cam 300 so as to tend to turn it in thedirection so as to move earn 310 out of engagement with wedge 308 whenboss 331 is released by lever 235. To this end, eccentric cam 32% (FIG.5) is mounted on shaft 127 on the side of frame member 128 which isopposite to pulley 131. Cam 326 serves as the drive for the previouslydescribed bar 268 which in turn controls the mechanism for applying thestop to the tape. Of course, in the start position of FIG. 6, the cam320 is positioned relative to the rear stud 203a and adjusting nuts 321and 322 on bar 208 so as to permit bar 208 to remain in its rearposition.

Cam 320 comprises cylindrical collar 330 eccentrically mounted on shaft127, ball bearing assembly 332 on collar 33%) and outer collar 331 onbearing assembly 332.

Frame member extension 323 extends upwardly from frame member 123forwardly of frame member extension 222. Bearing block 32 2- is fixed tomember 323. Bearing member 324 is elongated and is slightly forwardlydownwardly inclined. Rod 325 extends slidably through a bore in block324, bearing downwardly biased by means of internal spring 326 in block324. The lower end of rod 325, below block 324, carries a head 327 whichfrictionally abuts the periphery of cam 320. In the start position, head327 engages the periphery of collar 331 at a point designed to exertleverage (FIG. a) so as to tend to turn the assembly 320' in the desireddirection (arrow 3211a,) spring 326 being extremely powerful. When boss301 is released by the appropriate movement of lever 235, the assembly3211 and shaft 127 are moved sufficiently so as to clear cam 3 fromwedge 363. Cam 3% is now free to turn in unison with pulley 131. This isshown in FIG. 7. During the next part of the cycle of movement of theclutch, cam assembly 32%? engages nut 322 and drives bar 2118 forwardlyso as to place the stop on the tape.

Next, as shown in FIG. 8, and while bar 208 is still being urgedforwardly, boss 361 engages and drives forwardly a longitudinal rod341). Said rod 340 is journaled in a longitudinal bore of a bearing box341 shown in FIG. 26 and fixed to the frame by any suitable means (notshown). Forwardly of box 341, shaft or rod 340 carries a fitting orbracket 342. Longitudinal screw stud 343 is fixed adjustably into thefront end of bracket 342 by means of adjusting nut 344 and carries afront head 345. In the forward movement of rod 340 (arrow 346), the head345 engages the previously mentioned stud 171 on member 1715, and turnsmember 170, against the action of spring 172. As previously mentioned,the effect of this is to release the rearward tension on the pin 164which extends through the slider blank. Now, if a stop has been insertedin place, the pin 164 is located just about at the position of the stop(FIG. 19). Accordingly, the stop can ride over the rounded bottom rearcorner 165a of member 164, so that the movement of the web can beginagain. On the other hand, if no stop was presented to be inserted inplace, then the pin 164 has been pushed all the way into the slot 204and the web cannot move.

During operation of the one revolution clutch, pin 290 on the shaft 127engages against and depresses the front end of lever 239 (FIG. 8), so asto elevate bar 232 and prevent the clutch from being actuated again.This is necessary to insure that the clutch will not be actuated againin case the bar 138 does not return to its front position, for instanceif a stop is not applied. In that case, of course, upon continuedrearward movement of the drive assembly, the control mercury switch 141is opened and the operation of the machine is stopped; but in themeantime, the clutch should not be actuated again.

Summary 0] Operation While the detailed operation of the machine will beapparent from the foregoing, the operation may be summarized as follows:

The zipper blank is initially threaded over the anvil between therollers 118 and 119 of the drive assembly 1110. Plate 187 and itsflanges 191 bear under tension against the blank to hold it in position.Pin 164 bears against the front spaces of the scoops. The one revolutionclutch mechanism is in its position of FIG. 6. FIG. 16 shows thestarting position of pin 164.

Upon starting the machine, the zipper blank is moved forwardly by therollers 118 and 119. When pin 164 enters a slit in the zipper blank andreaches the trailing end thereof, the zipper blank can no longer moveforwardly. Rollers 113 and 119 continue to turn, and the result is thatthe pivoted drive assembly moves frictionally upon the blank to itsbroken line position of FIG. 1. FIGS. 17 and 18 show the location of pin164 extending through the slit first at the leading end and then, at thetrailing end thereof. Pin 164 extends between the legs of the lowermoststop and against the head.

As the result of the rearward movement of the drive assembly, bar 138moves rearwardly, between frame member 128 and member 227, therebyswinging plate 225 and hence pivoting lever 235, so that the front endof lever 235 clears cam projection 3% on cam member 390. The force ofrod 325 on cam member 320 causes rotation of shaft 127, which ispermitted since cam projection 301 1b is no longer blocked. As a result,cam 310 clears cam 3118, as shown in FIG. 7. This permits movement ofslide member 303 from its rest position of FIG. 14 to its engagingposition of FIG. 15, whereby the clutch is engaged. Accordingly, shaft127 is turned in a positive manner.

The resulting rotation of cam member 320 causes bar 2118 to be movedforwardly. Hence, as shown in FIG. 18, the stop is moved toward theanvil. This is also shown in FIG. 23. FIGS. 19 and 24 show the stopsecured in place, in the usual way, upon the zipper blank.

During operation of the one revolution clutch, lever 239 maintains lever232 in elevated position so that bar 235 returns to its normal positionand the one revolution clutch cannot be tripped again at the conclusionof a revolution thereof.

Also during operation of the one revolution clutch, after the stop ismounted upon the zipper blank, cam projection 3111 strikes rod 34-0, andmoves it forwardly, so that plate 159 releases the tension upon pin16 1. Cam 321) clears head 322, so that bar 2118 may be returnedrearwardly by its spring, thereby causing bar to be moved rearwardly. Asshown in FIG. 20, the stop can ride over the rear end of pin 164, andmovement of the zipper blank can continue. This forward movement of thezipper blank is facilitated by the forward movement of the driveassembly 1%, there being thereby two components of force acting upon thezipper blank so as to move it forwardly. The motion of the onerevolution clutch stops when it returns to its initial position.

In the event that pin 164 is not opposed by a stop after it enters thezipper blank slit, the pin moves rearwardly into slot 201, and thezipper blank cannot advance. The drive assembly 1611 continues to moverearwardly until switch 141 opens, thereby opening the circuit of themachine motor and stopping the machine.

The hopper is continuously agitated, and as stops are fed into the track33, 39, they fall by gravity into position to be mounted upon the zipperblanks.

While I have disclosed a preferred embodiment of my invention, and haveindicated various changes, omissions and additions which may be madetherein, it will be apparent that various other changes, omissions andadditions may be made in the invention without departing from the scopeand spirit thereof.

What is claimed is:

1. A machine for applying bottom stops to a zipper blank, said zipperblank comprising elongated side-by-side tapes and scoops, said tapeshaving scoop intervals wherein said tapes respectively have said scoopssecured thereto with the scoops of one tape interlocking with the scoopsof the other tape, said tapes also having scoop interruption intervalsin which they are free of scoops; said machine comprising an anvil,means for drawing said blank over said anvil and through said machine,means mounting said draw means and said anvil so that one is movablerelative to the other, said anvil having a through slot opposite saidblank, a pin slidably received within said slot, spring means urging oneend of said pin against said blank and into a scoop interruptioninterval, means responsive to the engagement of the trailing end of saidscoop interruption interval against said pin for causing relativemovement of said draw means and said anvil, and means responsive to saidrelative movement of said draw means and said anvil to apply a bottomstop to said blank against said anvil, said stop thereby striking andretracting said pin, said pin being shaped for resulting slidingmovement of said bottom stop and said scoops over said end of said pinfor resumption of movement of said blank.

2-. A machine for applying bottom stops to a zipper blank, said zipperblank comprising elongated side-by-side tapes and scoops, said tapeshaving scoop intervals wherein said tapes respectively have said scoopssecured thereto with the scoops of one tape interlocking with the scoopsof the other tape, said tapes also having scoop interruption intervalsin which they are free of scoops; said machine comprising an anvil,means for drawing said blank over said anvil and through said machine,said draw means comprising a lever, means pivotally mounting said leveron said machine ahead of said anvil so that said lever is movable towardand away from said anvil, means biasing said lever away from said anvil,a pair of draw rollers mounted on said lever to draw said blanksforwardly between said rollers, and means for turning said rollers, saidanvil having a through slot opposite said blank, a pin slidably receivedwithin said slot, spring means urging one end of said pin against saidblank, and into a scoop interruption interval, the turning of said drawrollers against said blank being in a direction to pivot said levertoward said anvil when said blank stops moving as the result of theengagement of the trailing end of said scoop interruption intervalagainst said pin, and means to apply a bottom stop to said blank againstsaid anvil, said stop thereby striking and retracting said pin, saidspring means being stretched and placing said pin under tension, saidpin being shaped for resulting sliding movement of the said bottom stopand said scoops over said end of said pin for resumption of saidmovement of said blank, said stop applying means having actuating meansincluding said lever and being actuated by said movement of said lever.

3. A machine according to claim 2, said machine also comprising meansrelieving the tension upon said pin when said bottom stop is applied tosaid Zipper blank.

4. A machine according to claim 2, said means for applying said bottomstop to said blank including a normally disengaged one revolution clutchhaving engaging means actuated by said lever, a push rod driving saidstop against said anvil, and cam means coupling the driven member ofsaid one revolution clutch to said push rod for actuation thereof uponactuation of said one revolution clutch.

5. Machine for applying bottom stops to Zipper blanks, said zipperblanks comprising elongated side-by-side tapes and scoops, said tapeshaving scoop intervals wherein said tapes respectively have said scoopssecured thereto with the scoops of one tape interlocking with the scoopsof the other tape, said tapes also having scoop interruption intervalsin which they are free of scoops; said machine comprising an anvil,means for drawing said blank over said anvil and through said machine,said anvil having a through slot opposite said blank, a pin slidablyreceived within said slot, spring means urging one end of said pinagainst said blank and, into a scoop interruption interval, normallyinactive means for applying a bottom stop to said blank against saidanvil, said stop thereby striking and retracting said pin, said springmeans being stretched and placing said pin under tension, and meansresponsive to the movement of the tape feed means for actuating saidstop applying means.

6. Machine according to claim 5, said machine also comprising meansrelieving the tension on said pin when said stop is applied to saidblank, said pin being shaped for resulting sliding movement of saidbottom stop and said scoops over said end of said pin for resumption ofsaid movement of said blank.

7. Machine for applying bottom stops to a zipper blank, said zipperblank comprising elongated side-by-side tapes and scoops, said tapeshaving scoop intervals wherein said tapes respectively have said scoopssecured thereto with the scoops of one tape interlocking with the scoopsof the other tape, said tapes also having scoop interruption intervalsin which they are free of scoops; said machine comprising an anvil,means for drawing said blank over said anvil and through said machine,said anvil having a through slot opposite said blank, a pin slidablyreceived within said slot, spring means urging one end of said pinagainst said blank and into a scoop interruption interval, means forpositioning a bottom stop opposite said pin and said anvil in positionto be applied to said blank, a normally retracted pusher movable againstsaid bottom stop to drive it upon said anvil and into said blank andthereby retract said pin, said pusher having a further slot in the endthereof which receives said pin in the event that there is a failure tosupply said bottom stop to its application position.

References Cited in the file of this patent UNITED STATES PATENTS1,601,442 Havener Sept. 28, 1926 1,859,101 Lyons May 17, 1932 2,631,638Levine Mar. 17, 1953 2,685,948 Freeman Aug. 10, 1954 2,723,011 HavirNov. 8, 1955 2,766,452 Hansen Oct. 16, 1956

1. A MACHINE FOR APPLYING BOTTOM STOPS TO A ZIPPER BLANK, SAID ZIPPERBLANK COMPRISING ELONGATED SIDE-BY-SIDE TAPES AND SCOOPS, SAID TAPESHAVING SCOOP INTERVALS WHEREIN SAID TAPES RESPECTIVELY HAVE SAID SCOOPSSECURED THERETO WITH THE SCOOPS OF ONE TAPE INTERLOCKING WITH THE SCOOPSOF THE OTHER TAPE, SAID TAPES ALSO HAVING SCOOP INTERRUPTION INTERVALSIN WHICH THEY ARE FREE OF SCOOPS; SAID MACHINE COMPRISING AN ANVIL,MEANS FOR DRAWING SAID BLANK OVER SAID ANVIL AND THROUGH SAID MACHINE,MEANS MOUNTING SAID DRAW MEANS AND SAID ANVIL SO THAT ONE IS MOVABLERELATIVE TO THE OTHER, SAID ANVIL HAVING A THROUGH SLOT OPPOSITE SAIDBLANK, A PIN SLIDABLY RECEIVED WITHIN SAID SLOT, SPRING MEANS URGING ONEEND OF SAID PIN AGAINST SAID BLANK AND INTO A SCOOP INTERRUPTIONINTERVAL, MEANS RESPONSIVE TO THE ENGAGEMENT OF THE TRAILING END OF SAIDSCOOP INTERRUPTION INTERVAL AGAINST SAID PIN FOR CAUSING RELATIVEMOVEMENT OF SAID DRAW MEANS AND SAID ANVIL, AND MEANS RESPONSIVE TO SAIDRELATIVE MOVEMENT OF SAID DRAW MEANS AND SAID ANVIL TO APPLY A BOTTOMSTOP TO SAID BLANK AGAINST SAID ANVIL, SAID STOP THEREBY STRIKING ANDRETRACTING SAID PIN, SAID PIN BEING SHAPED FOR RESULTING SLIDINGMOVEMENT OF SAID BOTTOM STOP AND SAID SCOOPS OVER SAID END OF SAID PINFOR RESUMPTION OF MOVEMENT OF SAID BLANK.